Pipe-wrench.



PATENTED DEC. 20, 1904.

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I III! N MN lam 1 m w www 1 N w a U L m- N M MQ u w Witt-wows No.778,051. PATENTED DEC. 20, 1904.

- J. J. LAYTON.

PIPE WRENCH.

APPLICATION FILED JUNE 9, 1904.

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Patented. December 20, 1904.

UNITED STATES PATENT OFFICE JOHN J. LAYTON, OF BUTTE, MONTANA.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 778,051, dated December20, 1904. Application filed June 9, 1904. Serial N o. 211,812.

To all whom it may concern.-

Be it known that 1, JOHN J. LAYTON, a citizen of the United States,residing at Butte, in the county of Silverbow and State of Mon tana,have invented certain new and useful Improvements in Pipe Wrenches; andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to improvements in pipe-wrenches of the kind knownas chain wrenches; and it consists in the construction, combination, andarrangement of devices hereinafter described and claimed.

The object of my invention is to providea wrench of this character withan adjustable jaw as well as a relatively fixed jaw, whereby the wrenchis adapted for use on fittings of irregular form and for gripping asurface no wider than the width of one of the jaws.

In the accompanying drawings, Figure 1 is an elevation of awrenchembodying my improvements, showing the same in use for turning abushing, the pipe to which the bushing is attached being indicated incross-section.

- Fig. 2 is a similar View at right angles to Fig.

1. Fig. 3 is a detail sectional View, on a larger scale, taken on theplane indicated by the line cm of Fig. 1. Fig. 4 is a transversesectional view of the same, taken on the plane indicated by the line b bof Fig. 1; and Figs. 5 and 6 are detail elevations of the shorter andlonger jaws, respectively.

Thelever 1 has its innerend bifurcated to form a pair of arms 2, whichare appropriately spaced apart and are each provided with a transversescrew-threaded opening. On the opposite sides of the respective arms 2are secured the jaws of the wrench, the jaw 3 being longer than the jaw4 and being longitudinally adjustable. Each of the said jaws is formedon its inner side with a longitudinal recess 6 to receive the outer sideof the arm, the flanges 7, which form the sides of the said recesses 6,bearing against the sides of the said arm, as shown. The jaw 4 has anopening 8 to register with the threaded opening of one of the arms, andthe jaw 3 has a plurality of such openings 9, 10, 11, and 12, any

one of which may be caused to register with the threaded opening of thearm,*according to the extent to which the said jaw 3 is adjusted. I Thesaid jaws are secured on the said arms by means of screws 13, the shanksof which are suitably bored from their inner ends to receive a pin 14,to which is connected one end of a pivoted link 15. The innerend of thechain 16 is connected to the said link. The chain-pins 17 project fromopposite sides of the chain-links for a suitable extent and are adaptedto engage side notches with which the jaws are provided, so that thechain may be connectedto the said jaws at any desired adjustment of thechain, according to the diameter of the object around which the chain ispassed when the wrench is in use. Each jaw has its outer end serrated onopposite sides and suitably rounded, as at 18, to enable the jaws tofirmly grip the smooth surface of a pipe, bushing, or other object.

It will be understood that by placing the screw 13, which secures thejaw 3 to the lever, in one of the adjusting-openings 9 1O 11 12 withwhich the said jaw 3 is provided the latter may be secured at anydesired adjustment on the lever, so that its outer end may be either inline with that of the jaw 4 or projected beyond that of the said jaw 4to any desired extent, according to the difiference in the diameters ofthe two objects to be grasped by the respective jaws.

In Figs. 1 and 20f the drawings the long adjustable jaw 3 is shown asengaging a pipe a, around which the chain is passed, while the shorterrelatively fixed jaw is shown as engaging one side of a bushing b, thediameter of which greatly exceeds that of the said pipe (0. The jaw 4,which is relatively fixed, is provided with only a single pair of sidenotches 19 for engagement by the pin 17 of the chain, one of the saidnotches being on each side of the said jaw. Thelongitudinally-adjustable .jaw 3, however, has a plurality of pairs ofjaw L for engagement by the pins of the chain 16. The notches 21 aredeeper than the notches 22 23, and the notches 20 are so deep as toextend entirely through the flanges 7 of the jaw 3. The deepened notches20 21 clear the chain-pins 17 when the wrench is adjusted as shown inFig. 1 to allow that portion of the chain between the work and thenotches of the jaws engaged by a chain-pin to be straight.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-- I 1. A wrench of the class described comprisinga lever having apair of jaws, a chain having one end connected with thelever, said chain and jaws having coacting devices to ad; justablyconnect the chain to the jaws, one of the latter being longitudinallyadjustable, for

ing a lever having bifurcated arms, the latter having screw-openings,one of the jaws having' a screw-opening to register with that of one ofthe arms and the other jaw being longer than the first-named jaw andhavinga plurality of such screw-openings, any one of which may be causedto register with that of the other arm, and screws to secure the saidjaws to the said arms, and a chain having one end connected to thelever, said chain and said jaws having coengaging devices to adjustablysecure the chain to the said jaws, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit- 35 nesses.

JOHN J. LAYTON. Witnesses:

M. SownR, J. W. KEMPER.

